Answer:
Step-by-step explanation:
-35/2 x (-21/5)
-7/2 x (-21/1)
-7/2 x (-21) = 147/2= 78 1/2
Answer:
BBBBBBBBBB
Step-by-step explanation:
1/4 mile per 22.5 seconds
Answer:
c = 2 , d = 3
Step-by-step explanation:
(2y^3)(9y^3) = 18y^6
Answer:
the answer is 27
Step-by-step explanation:
Since both intergers are negative, two negative intergers multiplied equal a positive answer. after wards just multiply 9 and 7 together. I hope this helped.
Do you remember when you were learning about
Least Common Multiple (LCM) ? And you were
wondering what on Earth you would ever need it for ?
THIS IS IT !
The amount of time after 8 PM when the lights will flash
together again is the LCM of 20 seconds and 30 seconds.
Do you remember how to find it ?
... When 20 is prime-factored, you have 2 · 2 · 5 .
... When 30 is prime-factored, you have 2 · 3 · 5 .
... So the Least Common Multiple of 20 and 30 is 2 · 2 · 3 · 5 = 60 .
The lighthouses will flash together again in 60 seconds after 8 PM.
That'll be 8:01 PM.
